Motion-controlling mechanism



Dec. 15, 1925. v, 1,555,833-

J. W. WATSON MOTION CONTROLLING MECHANISM Filed Aug. '7, 1919 2 Sheets-Sheet 1 INVENTOR WITNESS I ATTORNEY8 Dec. 15,1925. 1,565.833

J. W. WATSON MOTION. CON'iROLLING MECHANISM Filed Aug. '7, 1919 '2 Sheets-Sheet 2 3? V as; n E -za J9 El WEN 10 (job/z W22" Azz ATTCRNEYS Hate-nick] Deal 15, 19325,

UNETIEE} swim tween any awe olomenis, and iii parliculm" relates to um class of insclumism intended to coo-oi: tho moo-ii oi ronouil of Yeluclo rem-l; 'loL clesirech my L spiin gs ills}:

- l on i ployoil in oomuciion rslu'i'voly am able elements iraling or checking I in one (.iilBCtlOil without m-luifid or checking their relative movement lR zmoilier direction.

A particular object oji' my iiivei'itioii is to provide :1 friction motion controlling 1168i :miszu, which, uncle? all no'nuil conciilions oi opmulion and Wil; in the total, I'kin range of L V rjuovlumism, cannot be mused. 0i mumot toluiL to jam or become locked against opmfafiioo 'i'o :lcuoni gilisli the in lilo embo li- .mouiv HllOWll and (liFSL gl. .iiorewitli, l inilllllU u drum member, :l fricla'on mambo partiallyQuiz-minding said dirt and :1 power inuisuiittiugg mouiber (in this instance, strap '5) zittuciwd lo t friction uuemlm at such goiulz ilioi'oon as to provide for lilo device a ouliiciout Working range nocosui. tz'l ing l'llfiil "Clio strap be Wiiluuu: wound upon the fYiCi/AOH member beyond the gup iu Silili 'i iictiou .l'nfil'l'lilfil", 'lhus not bridging this gap time dovive cannot UBClBl' uoi'uml (-ondilcious oi opei'uliiou become looked ugminsl' operation;

It; is a further object of this invention lo reduce time funolions: of certain members of the zuoolumism to miniu'uuu 1112111501".

:2 For example, in i'llO mulioilimenis shown, the

functions of 'illl 'li'il'liou member are realiueil to merely llioso of generating Emotion :uul rests-ling l'liz" W011i. i' ssulling "l'iou'l this iriciion. L zew: in (lie embodiments shown. llio 'fuiu'liou of the power tl'zzusmi'tti: is reduced merely to filial of Elimination filed August 7, 1912?. i -win 332's).

member,

imusmilzi magor furictions of ill a ililo'l'l may i252 ie-sa ing 0 such ma 121i was to aroporlydo lLllQll respeclo s'motl up and give long ser films limiting the members, each oi so bull foul made mg power. ll

vino undo? SL i VOIlL it is {L further OiJjQCiJ-Ofi my invention ii-(l provide, a was un sni, for "the puypo a slated, iuolml'i ii to the ol'i'ibociiment shown, the )or is itself relieved of all r Sf-36S otiiei' than direct tor- Which might be set up in i'he ii'uusuussii'm of its pO'WQ1*,l3' Yl'IlQEH1S of spring box 123, spring box cover .19: and. the bearings lo and is a v n-oxide a mechanism in which the main spring olomuui iv housed or boxed or in souw otlu i' way umiul'uineil within proileioruiiuexl, limits, so that, regardless of the extent lo ii liic'll this spring may be wound up or unwound ii incapable of exceeding those, limits and hence is incapable of Yul)- loing or binding or in any other way C(Hlling in moving coulzul: will: other relatively .iuovziblo pan-ts ol' Lilo mechanism. The pur- 056 oi limo providing: against any such contact is to iusuilu at all limes, and for an zulj'usimeui of the iuccluiuimn, smooth and Ulllltlnllllki oporu'liion and long service. Anol'lier purpose of iilius housing; or other!- wise uminioiniog Within limits this moossarily-beau umiu swing is to facilitate in assembling and disassembling ill), lllQllllv .uism.

\ ziiious oomliinnliom of elements and.

in in as not to "be con'ipromised lo-o muli-auliumil of luis invsniiou iv Figure 1 cross section on line i i-ll Figure 1, but showing a modification providing tor extcrnal adjusting means. Figure t is the same as Figure 2 except for showing a modification in the means for maintaining the spring vvithin limits and for limiting the operative stresses on the spring to direct annular stresses. In all four figures, like numbers refer to like parts.

Referring: to Figures 1 and 2, X and Y represent relatively movable elements whose motion. one relative to the other, it is desired to check, regulate or control. These elements are illustrated merely diagranm nlatically for the purpose oi indicating that this invention may be applied and utilized in connection with any elements which move, one relative to the other, and hose movement it desired to elleetivel v control.

A drum member 3 is carried by the element X and is secured thereto by any suitable means such as by cap screws Securely fixed to the drum member 3, by, means ot a right hand or left hand thread, depending upon the rotation of other of the members, is a member if Secured to n'ieniber 19, as for example by the pin 21, a spring The other end of spring is secured to a )ring box 13 by any suit means such as by a stud Spring be: is free to rotate on member as also the spring box cover 14 free to rotate on member 19. if desired, for the purpose minimizing 'wear between member 19,-ancl. members 13 and 1 1 bushings and 25, of any suitable material, may be interposed as illustrated. Secured to member 13, for example, i rivets 12, a disl: ll. means of a stud 10, which is secured to disk is, and means of the looped. band 8 and. rive' 6, the member ll. is scuired to a fri ion moiib r 5 which latter membe in the torrent 5;. split ring and contacts with drum member 3. Friction member 5 may heprovided with a backing 9, as shown, ii. tor the purpose of additional strength or for the purpose of flexibly maintaining any given curvature to member 5. In addition to the above, this baosing 9" possesses the function tively as ociated in various other Ways than that just (lESCIlbGQ' and still incorporate t herein the essentials of my invention.

As attached, in the present instance, to ele ments X and Y, the invention is operative to retard or control the relative separation of these elements Without retarding their relative approach. The operation of the device, as shown in the present instance, may be described follows Spring 22 which, in assembling, is wound up to any desired tension, is constantly'tencling to revolve spring box 13 and disk 11 with relation to member 19,,and, also therefore, with relation to drum 3. And, by means of stud 10, bamlS and rivets (5, spring EZQ-is hence also constantly tending; to rotate friction member 5 around drum number 3. Thi s tendenc Y however of sjrin member 22 to 1 7 i t:

thus rotate member 5. with relation to drum 3, is resisted by means of the power trans miting neniberi which is secured to friction member 5 and alsoto- QlGlIltZl'lt Y. l i hen, however, elements 5; and Y are caused to approach each other, this tendency ofxspring 22, to rotate these parts as above, becomes an action and the parts are thus rotated to whatever extent is permitted by the extent of approach of elements X and Y. And as these members thus caused to relatively rotate, it Will-be seen that power transmitting member 7 is wound upon inember'o. Member 7, however, is attached to member 5 at such a point thereon as to prevent member 7 from being Wound upon member 5 beyond the gap in member 0 even when the elements X and. Y have approached each other to their limit.

When elements X and Y are caused to separate, their separation is resisted by the invention, as followsrv ii hen and, thus separate, power transmittingmember 7 is made to pull on member 5-1: nd cause it to rotate with relation to drum 3. This rotation of member 5, with relation to drum 3, however, is resisted by the lrictionbetween these two latter members, 1

which friction is au inented by the resist once of spring'fZQ wh ch, as shownaboi e, is

pulling, in the reverse direction, on. member.

througli the media of box 13, disk 11, stud 10 and band 8. While it is true that this iteration Ina cause the windingsup ofthe" 'ng possibly to the extentof-three-quarof a turn, the increasing resistance pro-v y this Winding-up act-ion is negligioi npared -with the force required to overcome the friction between the drum and the parts coacting; therewith. And'the res sistance produced by this friction naturally decreases tn :res. of the curved friction shoe iorcibly p no against the drum by izbe rension of strap '2, approaches a mini mum. 11%; must; be remembered however flint simply 30 decrease the area, between resciing friction members does not necessarily decrease the force required to overcome she friction between them. One method of die messing the foree required to overcome irieiiioh between two members is to reduce we pressure between them, and. in the mrirenler emeoelirnent of my invention idnsiresed herewith this accomplished, as elements X,

and Y segaziretediy deerensingthe ereefwrap oi inen'lber weaned be friction members. ii'hile I have here iilnsrsiei and in detaii described one method of decreasing the r sistence to the separation of elements X and. Y, I do not wish thereby to iimit myself lzo this yarticniar form, arrangement and associeiion of parts for bringing about this resuit, but Wish to avail myself of such variations and modifications as some Within seope of the appended claims. The amount of :i'ricliionel resis nnee may be aitered. by readjnsting; the tend-ion of spring as any such re-erljnstment will cause an increase er decrease in the pressure between l he friction .znembers due to fihe increase or decrease in the pnil requi ed on member '4' to reietively more die members.

"if de ired, some form of external spring ridges g means may be provided, us. for

erreniipie, somesneh conssruc'iien as shown in Figure 3, in which member 19, instead of being threeded end thereby held rigid wilh relation to drnm 3,is rommbiy mounted there with. fat its other end, member 19 is rotatably snriported by an aperture in cover plate 18. screwed inlo this end of member 19, or etherwise suitably fixed thereto, is a. member or heed 20 which is formed to eccomn'iodziie 11 wrench and thus-provides :1. means for winding the melnl'ier 1S) and thereby edjnsl' he tension of spring 253. By means of regisnn'ing holes through heed ill} and cover plefie ll end by means of pin 26, any desired nsmnent of spring; is nniinieinml,

in Figures 1, 2 and 3, ii. will be noted iihzzl; spring 2:) is snbjeetmi to no stresses other iiiwn direct nnnniar stresses. This ieninre of extreme iinporlzunru. as con.- U [he ponnnereini value of the derive. bersinsli side stresses or other stresses which might be selup in :2. spring. for lhe purpose also be noted their is also of extreme imporisnce not only from the point of view of iong iife, but also from i be View Point of smooth, nnhsmpered end hence rntislectory operetion of the mechsv nism. I

in Fignre is shown :2 modified means for meinlnining' the spring within limits enci eiso means reiieving the spring of any and sail stresses other than direct ton sional stresses. inthis rgiodification shown in Figure 4, any stresses or other stresses rosuiting in trsnsmiliiing the power of 'he s} ring the nlenrl'ier 8 and intnrn 'co members 5 and 7 will be absorbed by causing member 1-33 to. press against the unyielding edge of friction member 5, the spring being so posiiioned on member 19 by means of pin 21 as to hold member }l---13 snugly against the entire edge of member 51. In ibis modification, member Ll-A3 and member 5 bike. the place of spring he); 13., cover 14 and bearings 15 and 16 as shown in the embodimenc iiinstrated in Fig nres i, 2 and S it will be noied that power transmitting men'iber 7 is attached to friction member 5 as snrh a point thereon to provide ample Working image for the mechanism without necessitating rhei member 7 be "wound on friction member 5 beyond the gap in this latter member.

It will. further be noted ihirt member-5 has no major functions other than gene atlng friction and resisting the wear resulting from this friction, and that member 7 has no major 'Ennvtion oliher than the trans mission of power.

hile I have illustrated and described a preferred fOlRi of ronstrnvtion for cerrying my invention into eii'eet, this is capable of variations and nmdiiieations with out departing from the spiritoi iTllG invention. ll, therefore, do nol wish to be lilniled to the precise detz'iils ol wmstruc-tion set forth. but desire to mail myself of such VllllltiLlOllS and mmiiiimniions as mine within the srope oi the appended claims.

Having thus described my invention, What- 1 claim and desire to prefers by Letters Putent of the Unified Slides is: 1. in mm-imnism ndzipi'ed for use in conilil'lTlUll will: 1 W0 relntirei mu able elements for vhvvlring: their relative IllOliOll in one direvliun. a drum adapted to he seemed to one of said elements, a frielion, member. in the form of a split ring. in mnlzn'i with 'I drnnnn power trnnsmil ling membersccnrr-d to said frivtion member. and adapted in be secured to said other Moment, :1 swin cronnecied to said drum and to said iririion memhernnd tending to roizn'e sni her being attached to said friction member at avpoint thereon which makes it possible for the device to operate throughout its Working range Without necessitatingthat said power transmitting member be wound upon sa1d friction member beyond the gap in said friction member. f -c 2.- In mechanism adapted for use in connection 'ivitir'itwo relatively movable elements for checking their rclativemotion in one-direction, a'druin adapted to be secured tonne of said elements, a'triction member,

in the 'form ofja split ring, passing around only a portion or said drum, a power transmitting member secured to said friction.

member and adapted to be secured to said other element, a spring connected to said drum and to said friction member and tendin to rotate said iriction member with relfion to said drum andalso tending to Wind said power transmitting member upon said l'riction member, said power trans-x mitting member being attached to said fric- 'tion member at a point thereon which makes it possible tor the device temperate throughout its Working range without necessitating that said power, transmitting member be Wound upon said friction member beyond the gap in said friction member.

3. In mechanism adapted for use in connection with two relatively movable elements for checking their relative motion in one direction, drum adapted to be secured to one of said elements, a friction member, in the form of-a split rin passing around only a portion of said'drnm, zr1)o\ve1- transmitting member secured to said friction moniher and adaptcdjto be secured to said other element, a spring connected to said drum and to said friction member and tending to rotale said friction mcmbcr with relation to said drum and also tending to wind said power transmitting nu-mbcr upon said l'riction member, said power transmitting member being attached to said "friction member at a-point theriain which makes it possible l'or. the device to opcrate throughout its c working range without necessitating that said'power transmitting member be wound upon said friction ncmberbeyond the gap in said friction l'ncmbcr, and means to main- EH11, said spring within predctcrm med lmnts regardless of the extent to .whlch said spring maybe wound Jup-ornnwound.

Al. in mechanism adapted for use in conncction-with lwo relatively movable elements for checking their relative motion in one di-- 5 rcclion, a drum adapted to be secured to one of said elements, a friction membciu in the form ot a split ring, passing around only a portion of said drum, a power transmitting member secured to said friction member and adaptcdto be secured to said other element,

a spring connected tosaid drum and to said frictionmember and tending to rotate said essee-e friction member with relation to said drum and also tending to Wind sald power transinitting member upon said friction member, said power transmitting member being attached to said friction member at apoint thereon which makes it possiblefor, the device tooperatc throughout its working range without necessitating that said power transmittingmember be wound upon said friction member. beyond the gap in said friction member, and means to maintain an end pol drum and to said friction member and tending to rotatesaid friction member with relation to sa d drum and also tending to wind said power transmitting member uponisaid friction member, said power transn'iitting member being attached to-said friction member at a point thereon which makes it possible for the device to operate throughout its working range without necessitating that said power transmitting member be Wound upon said friction member beyond the gap in ,nidl'riction member, the form of Said i'riction' men'ibcr being such as to maintain substantially constant the area of contact between itse l and said drum throughoutthe working range oil the mechanism.

-(3. In mechanism adapted for use in conncctioirwith two relatively movable elements for chccking their relative motion in" one direction. a drum adapted to be secured to one of said clenwnts, a friction member, in the form of a split ring, passing around only a. portion of said drum, a power transmitting member securcd to said Friction member and adapted to be secured to said other element, a spring connected to said drum and to said friction member and tending to rotate said friction member with relation to said drum and also tending to wind said power transmitting member upon said friction member, said power transmitting -1ncmbcr being attached to said friction member at a point thereon which makes it pos' sible for the device to operate throughout its working range Without necessitating that said power transmitting member be wound upon said friction member beyond the gap in said friction member, a member lying between said friction member and said power -t 'ansnntting member, and means for so transmitting {he pmveiv of sa i spring as to subject m}.- spring i0 fez-fi l'mi hrs-istil lgg; sfiressvs.

7. In mechanism for cnnhrolling m0tnn between relatively nmmble ekments, the combinatinniof a drum Mayp11 to be ae jured to one of saidalmnvum, rictlcn menflam' ixa mntac wifll-"sahl fh'um, a ming annnecting said drum and and Kristian IJI'LQHR bar, and a power n'smsmitting member meclmnicafly zattzwlwd to said fricrion mem her and adapted to be cmmectefi to midi other element, all being so cembined; as to cause said friction nlemlx-n' 10 slide frcdy on said drum when said flements approach each ether and cause a making actimx upon tha saparatioh of said elements, which braking action, by reason vi a vimnging relax him between the po'weutransfifiiing member and the friction member, dcmfemes as nbk? demeni's &pamte.

8. In mechanism for contz'oliing motion imf-ween reiati'veiy movable elements; M10 wmlkain ation of a drum adapted; to be secured w one 01? said dement a, a friction member in @0212. 045 with dmnn, a spring connecting said. drum and mid. friction member, and $9 power smitting mamber machanipzflly attached tosaifi friction member and adapted t0 be connected to Lea xiii mlmi' elez'nent all being so mmbined M3 in ar said frictisn member in 535119 f ii drum when szzifi. Piemefifis m and muse 2:2 by: king ac iio he mmium (23% said! elements; which i zwtiun by E'BEEOXK 11f changing; an 11m pmwy-trzmsdecreases :25; ,mxwnis sepztsh and mews t0 mantam 51nd spring Wain premay be Wmmd. 1m

cletermine to which said sprin wnmm.

9. In mechanism far senkx'ofling nw'laim hxtween reiativeiy mzwabie Qiexnsms, the wzfnbinavtion chum adapted in be 820mm; m one of said elements, a fwiction nmmbe in Contact Wii h said immn crm nectiv said drum and said; fricfiian mmfbmf, 221m. in power transmitting 111: 111129 211 361)." :itmchcii 30 said frictiw nvmg'xhey {U ME to be cmmested t0 id 0111;: being; so Cambium is cause mmnbmr to slide firmly 11 Q uid elements apprnacheash 0 xrflmag asi ion upml the sepm'zs '7 1i 7 whivh braking zxctiun, a (imaging; relation between Eh: n'amsmii-ting .znemher and; the fricizit" but; (iecmmicr: as as-id eiemanfis 1 cmnibirmtion 0?? arzs Ewing; such as in m min, i'hrrsugjwut the working ranglfzz of "the mechanism, tbs $211112 surface pnz'tion o fricfiiism mmnim n con-M22 xi die drum.

10. En mwfimczsm for: 9 m

z'nifing 1111436021 ban-men lw-laiivaiy m0 J 3 elements the:

combinaton of 12 drum adaptfi to be secumfi to 0116 0.? said elements a fz'iction. membe? in contact with said drum & spring cmmec king said drum and 552501 fricticm member, mail a; power ti'ansmitting member mwhsrvnicafiy at inched 256 said fricfizien memlm: and adapted; to be sonnsciecfi a0 athei: alamem, bein s0 cnmbim memnm" to sfiife said; eiemms el m1 (1mm when each othe? and GGRSB a braking mmiofinpsn the separation sf said Elements which bmhifig mtmn, by reasnn of a. changing reinfion between the pswei h'ansmitting mainl ser and. fine friction member, decreases as sai i ei-ements separate, a meinbeiy11g ha?" 921 rimiicm member and saw; powex-n'zmsmit' IQSEHEJGE am? means for so izi'a'nsmifitim H19 power 63? said I 3 ta m Eatemi sin far mnfimfling ma den e14 msm'nia element-s the & firm I memem m 3101i v, mamber Jinan B19111" ting i, muss a:

@n mantra! mm 11011 behw menis, a. (1m Y of s id e'iex v tract; with sai 51mm and mm klveiy moving U said wring and mifix cum I swim far m. inminina' an 530mm mi" said spring @116; 02 rubbingcum/act 01" the mechanism Whifih an; mwvszbis W said and mm Eric-Hen 1e. ihe mechanism is in opaiati' 1m wer-ixrsmsrniifingg memher Mtaahei frvxctian member. and aziapfaed t0 be 0th eeimnt am! being so assac aid lhctmw member as w decreas a 22m cs betwcm said fricizicm n1 .1 s drum as the elements misa- 1 & me direction 'hmzism adapted to central W0 a? en We relmimly movable siw a. 0 2mm m'iernbzffi m secured $50 mm mamm in con-- spring cmmecting c rlon memhmfol reias m muse saii fricfim'n acce ses her as to decrease, the frictional resistance between said friction member and said drum as the elements relatively move in one direction. with friction reducing means between the friction member and the power transmitting member. e

37. In lnecl'ianism for controlling motion between two relatively movable elements a drum adapted to be secured to one, of said elements, a friction member in contact with said drnm, a' spring connecting said drum and said Friction member, and a flexible power transmitting member mechanically attached to said friction member and adapted to be connected to said other element, with friction red ncing means between the friction member and the power transn'iitting member all being so combined as to cause said frlc tion, member to slide freely-on said drum when said elements approach each other and cause a braking action upon the separation of said. elements, \VlllCil braking action. by

reason of a. changing relationbctwecn tile imver-transmitting member and the friction member, decreases as said element-s separate.

In mechanism adapted For use in connecii on with two relatively movable elements for checking their relative motion in one direction, a drum adapted to be secured to one of said elements, a friction men-liver, in the form of a split ring, in contact with said drum, a flexible power transmitting member secured to said friction member and adapted to be secured to said other element, a spring connected to said drum and to said friction member member and tending to rotate said friction with relation to said drum and also tending to Wind said power transmitting member upon said friction member, with friction reducing means between the friction member and the power transmitting member said power transmitting member being attached to said friction member at a point thereon which makes it possible for the de vice to operate throughout its working range Without necessitating that said power transmitting member be wound iipon said friction member beyond the gap in said friction moire ber.

39. In mechanism for controlling motion between nelatively movable elements, a drum adapted to be secured to one of said elements, a friction member in contact with said drum and adapted to be secured to said other element, a spring connecting said drum and said friction member; and means in contact only with said spring and said friction member for maintaining said spring Within predetermined limits regardless of the extent to which said spring may be wound up or unwound with friction reducing means between the, friction member and the power transmitting member.

40. In mechanism ada ted for use in con.v

nection with two relative y movable elements tending to wind said power transmitting member upon saidfrictlon member. said power trcnsmittim; member being attached to said friction member at apoint thereon which makes it possible for the device to operate throughout its Working range with out: necessitating that said power transmittine member be Wound upon said friction member beyond the gap in said friction member, and the parts all. being so combined as to canse said friction member to slide freelrl on said drum when said elements approach each other and cause a braking action which decreases as said elements separate.

ii. in n'ieclianisni adanted for use in connection with two relatively movable elements for checking; their relative motion in one direction, a drum adapted to be secured to one of said elements, a friction member, in

the form of a split ring, passing around only a portion of said drum, a power transmitting member secured to said friction member and adapted to be secured to said other element, member lying between said friction member and said power-transmitting member a spring connected to said drum and to said friction member and tending to rotate said friction member with relation to said drum and also tending to Wind saidpower transmitting member upon said friction member, said power transmitting member being attached to said friction member at a pointthereon which makes it possible for the device to operate throughout its work ing range without necessitating that said power transmitting member bewound upon said friction member beyond the ga in said friction member, and the parts all eing so combined as to cause said friction member to slide freely on said drum when said elements approach each other and cause a. braking action which decreases as said elements separate.

42. In. mechanism for controlling motion between relatively movable elements, the combination of a drum member adapted to be secnred to one of said elements, a friction member in contact with said drum member, a spring connected to said drum member and to said friction member and tending to relativcly move said members. a flexible member mechanically attached to said friction member and adapted to be secured to said other 31 (:lomoni. and a friction railncing means he i-we-en tlnflmihlo inoinber and smri friction-- member all being so iiaoinhineii as io cause a.

decrease in the pressure area between soil? 7 -l (loxihle niz-nnhor and said friction-mammal.

as the elements niovoin one direction, means for nmintiiining' the outer end of said. spring away from Contact wish th drum portion of Sillfii (ll-om nnin' bor, and a. support for means to maintain said means away from Contact with (illlll'l poi-lion's? said CiI'illii a spring connected to said rlrnm member siinl to said friction member and lending to rein tively Inovn sou nien'il'mrs. a flexible member mei liani ally :xttaolnwi to said friction memoer :imlachmtml in he scoured to said other .monibor. fric iion reducing means holiweon element and :1 Friction roilnoing ine'nii ,r intwoon sairl fiexihlonmnhor and the friction inmnhor all being: so vonihinml as in cm scn (harem-=0 in tho prossui'o til'iihlllhVPtil said ixihlo inomhv and said l rici'ionnnnnhor as .iho Clements move in'ono direction, means to n'mintnin suiil spring wiihin pro-determined limits rog in'dloss of tho extent. in which said springnnly he wound up or unwound, and a. support to miiintuin said means away from contact with the drum portionor Stll l drum member.

44. In mechanism "for controlling motion bet-ween relatively nioviihle olenients, :1 drum ndupie-(i io-ho socnrecl to one-of said olements; :1 flexible memhor. a friction member in conl'nol wiiah iii clrnni :nn'l iirlzintoil to e secured to said oi'iror ole Hi1 hy said fi-xihlof m ml saicl fioxihle nnnnhoi'nncl sarhl friction ineii1- her. a spring: mnnocii'orl to said ch'nni and to said fi'irl'ion nwlnher. uni l moans in'conizici only with said spring: and said .1 riciion momboi' and their appnrl'enmines for nmininining liho onl'or owl oi said spring' min from nontnvt with said (lrinn.

4-5. in movhnnisz for iv-ontrolling relative niovonionli houwvon two Moments, The combination of two rolntivol v movable inrnii'iers.

n friction nn-inhor helwoen said nits,n'oors,. :1

spring: :inrl n fioxihlo member, soul spring: being COllllfltflltO each of saicl first-mentionml nmnhers and. tending: to move oiw of them, and also said flexible member, with relation to-the other on of said first-men tioned members being adapted for attachment to one of said eleninnts and the other of said first-mentioned members being at izn-hocl to said flexible member, said flexible moml'ier being adapted for a u'tziohment to said other element. the parts being so formed and, associated as to cause a decrease in the: force required to relatively move saici two in ijho force i'oqnirorl lo rel:

nni ion o labia-e13 movzhlo in '2:- spring nnil :1 spring lining" connocte iiionziizi em a ,mling: to of timin and also s I "Io mom -Tf-Ll8i3l0'i'1 collie other (inn or tiono'rl View: 2m lacing: :nlnpiin, it i'o one of said oliaznmns. :init.

.momneibeing Minn-foil l'or ssiiil otimrolmnsni; tho pin-is hoin and associi iied as to on 0 "form inquired to iolziiivoiy firstnaonfii'onorl in-innhors are reini'ii-rly mom-kl hy sniff her. i

1 7 minimum no lag nni'i vi t ,Zll hor. sail" ihlo. lntlkll gi l for ilinvhmenl' "m siiirl oi the hurts living F u li'irmml :mo

(ii as to mniso a (locreziso in 'hcqnirml to roloiively revolve 5on7, i mentionorl inemlmrs at: filo v are roll-iii lfiflO iiid by suivl fioxihl momhor.

4B. in lllCPilflDlFZll l'oi' oonh'ollin rolntivo movement imiwooniism oloniio ion of two relnl'i o x mo (i urn/lion inolnher hoi'vrovn and ailztzn'in-il to onv o'F Hum :1 Foxihlo mon'ilwr. szihl so" noi'iwl {o l :gn'l lL hers and howling io mom one of ihm' rolnl'ion (:o the ol'hor as said oloma iowurd earl: oihm'. ono of sziirl 'lionvil members hoing in'lzlpieil lHClli, lo one of will oiomoni's and of said ili'Ftll](llil0flO(l moinho's tnchwl to said flcxihle lnomheig mmnhoibeing ZlfiillPiPl'l for "rim-l1 said other ,clomont, the pairs v 1 mo in? q im -h o so im'inml and assooiafml as U) *nnso a lo 1 01m:

two first-mentionwil members hrrs :iro rolatiiolv movml in 5; member.

.111 mechanism for vontm movement between two Pl-1110 nation of two i'nlzn'zively mo a curved friction member between said mem bers and attached to oneof them, a spring and a flexible n'iember,-said spring being connected to each otsaid first-mentioned men'ibers and tending to'move one of them with relation to the other as said elements 1ll()\'(l lit)\\'2ll'(l each other, one of said firstl'!'l(3I\i,lUTlt.'(l members being adapted for at tachment to one of said elements and: the other ot said tin-:ta'nentioned members being attached to said flexible member, said lexible member being adapted for attachment to said othc' element, the parts being so formed and associated as to cause a decrease in. the force required to relatively move said two first-mentioned members as said inemhers are relatively moved by said flexible member. 0

Fit). in mechanism for controlling the reaction of a vehicle spring, the combinatinn ct two relatively revolvable members, a 't'riethm member between said members and attached to one of them, a spring and a tlrxible member, said spring being connected to each of said first-mentioned members and tending to revolve one of them with rela tion to the other, one of said tirstanentioned members being adapted for attachment to one ot' id elements and the other of said tirst mentioned members being: attached to said flexible men'iber, said flexible member being adapted for attachment to said other element, the parts being so formed and associated as to cause a decrease in the force required to relatively revolve said two firstn'ientioned members as they are relatively revolved by said flexible member.

51. in i'nechanism for controlling, with decreasing resistance, relative movement ibe tween two elements in one direction, the c mabinatio=i of two relatively revolval'ile i'i'icmbers, a friction n'ieniber between said members and held by one of them, a spring and a flexible member, said spring being connected to each .ol said lirst-u'ientioned memln and tending to revolve one of them with relation to the other, one of said first:- menlioned m mbers being adapted for at tachment to one of said elements, said lexible member being wrapped upon and atinched to the other of said first-mentioned members and adapted tor attacl'iment to said other element, the parts being so tormed and asmiciated as to cause a decrease in the pressurebctween said relatively revolvable members and id friction member as the ele ments separate.

In mechanism for controlling, with decreasing resistance, relative movement bet ween two elements in one direction, the combii'ialion of two relatively revolvable members, a t'riction member between said members, a spring and a flexible member, said spring being connected to each of said first-mentioned members and tending to re tively rerolvable members and said friction?- member as the elements separate.

S in mechanism for controlling relative movement between two elements, the combination of two cnrvedtrictionally opposed members, and a spring connecting said members, said spring when assembled in the mechanism bein lllCtllllfCIOlllZltlil held in' a partially compressed state before receiving its operating adjustment the functional axis of said spring coinciding with a. straight line penetrating within the curvature of one of said trictionally opposed members.

54. in mechanism for checking the too rapid separation of the sprung and unsprungr portions of a vehicle, a cylindrical drum member adapted to be attached to one of said portions, a friction member adapted to be connected to said other portion, a spring connecting said two members and tending to revolve the friction member aroundthe drum memberin one direction, and means rotatable with one end of said spring to maintain said spring within predetermined circum'ferential, limits regardless of the extent to which said spring is wound up or unwound the functional axis of said spring-maintaining means coinciding with a straight line penetrating within the circumference of sai ldrum member.

55. In combination, a cylindrical drum mmnber, a friction member in contact with said drum member, a-metallic spring for relatively moving said friction member around said drum member, and means having a bearing on the drum portion of said drum member, For maintaining the outer end. of saidmetallie spring; out oi contact with said drum portion.

56. In mechanism, the combination of two *t'rictionally opposed members one of which is; curved, a sprin connected with one of said members, and an encircling retainer for said spring which is instrun'iental in transmitting the power of said spring to said other member, the functional axis of said retainer ':oincidin;; with a straight line penetrating within the curvature of said curved member.

In combination, two curved and frictionally opposed members, a spring connected with one of said curved members. a rigid member conforming with the circumference of said spring and connected thereto, said rigid member being connected with said spring means thereby constantly tending to wrap the strap on the brake-band, drawing he connccted io the other of the two relatively movable ports; midtensioningz mcuns tending:- to wrap the straps @Ethe brake band towzirt the unconnected end and to draw'it into, frictional contact with the braking surface to resist separation of the said relativel movable parts and tending constantly to increase the amount of szud frictional contact. 3 r i ii device for controlling the rebound action following the forcing together oftwo spring connected parts, comprising a drum shaped member adapted to be connected to one of HilHl parts, a resilient brake band member in the l'orm of an incomplete or split ring, adapted to :t'rietionully engage said drum, spring. means constantly tending to advance one endbf said brake band around said drum, :1 flexible str2p,0n'e end of which is attached to the brake band to- Ward said advance end, and the other end of which isadupted to be attached to the other of sold spring-connected parts, the

it into frictional engagement with the drum to res st the scpuration of said parts. i

60. A device for controlling the rebound action :toll wing the forcing together of band member in the Form of on substantially cylindrical s'ta- 'Lsessss two spring-connected parts, comprisinga drum-shaped member adapted to be connected to one of said ports, a resilient brake incomplete ring adapted to frictionally engtige said drum, n spring-actuated member connected to said brake bend toward one end thercol' and constantly tending to zidvnnce the attached endfar'ound said drum, :1 flexible -st1'ap, onc end of which is adapted to be atteched to the other of SflHl spring-connectedparts,-and the other cnd'of which is connected with said spring-actuated member, the springnctunted member thereby constantly tendingto Wrap the strapcn the brake bond drawing it into frictional en.- gogeiinent with the drum to resist separation of said parts.

61. rebound absorber for vehicles com- )risnw' a non-rotating" member ')IOVl(l(,(l

with a substantiallycylindrical bra ring surface; a member journaled concentric with said braking surface; a flexible strap secured to the rotatable n'iember and adapted to be wrapped round the cylindrical braking surface; and spring means tending to rotate one member on the other to Wrap the strap on the cylindrical braking surface and tending constantly to increase the active braking surface; and a flexible brake band interposed between the flexible strap and the cylindrical braking surface and secured to the some member as the flexible strap.

62. A rebound absorber constructed as set forth in claim 61 provided With u'resilient band supporting the flexible brake band in substantially concentric relation to thedrum In witness whereof, I have hereunto set my hand this 6th day or" August, A. D. 1919.

, JOHN WARREN WA 'ISON. 

